Shaking endless belt for treadmills

ABSTRACT

A treadmill includes a frame having two rollers and an endless belt is mounted on the two rollers. One of the rollers is driven by a motor and a control device is electrically connected to the motor so as to control the motor to be rotated in different directions alternatively. The alternative rotation of the motor shakes the endless belt and the user&#39;s body.

FIELD OF THE INVENTION

The present invention relates to a treadmill which includes a control device for changing the operation modes of the motor so as to cause shaking to the endless belt so that the user on the endless belt is massaged by the shaking.

BACKGROUND OF THE INVENTION

A conventional treadmill 50 is shown in FIG. 5 and generally includes a frame and two rollers 51 are located at two ends of the frame, an endless belt 52 is mounted to the tow rollers 51. One of the rollers 51 is driven by a motor 60 and a transmission belt 61 is connected between the motor 60 and the roller 51 that is cooperated with the motor 60. When the motor 60 is activated, the roller 51 cooperated with the motor 60 drives the other motor 51 to drive the endless belt 52 such that the user can run on the moving endless belt 52. A control device 70 is electrically connected to the motor 60 and receives demands form the user to set the desired speed of the endless belt 52 according to individual needs. A support board is located beneath the endless belt 52 and includes serrated surface and the user is supported on that board. The endless belt 52 generates mild vibration when moving on the serrated surface of the board and the user may feel mild shaking. By changing the speed of the motor 60, the user may feel being massaging by the vibration or shaking. Nevertheless, it is not satisfied by most of the users because of it is boring to run on the endless belt without to much exercise to the user's body. Besides, the control device 70 involves complicate controlling steps to generate such change to the endless belt 52 so that the way that the control device 70 controls the operation of the motor needs to be improved.

The present invention intends to provide a treadmill with a control device which controls the motor to rotate in different directions periodically so as to cause the endless belt to shake while the user is running on the endless belt. The shaking of the endless belt exercises the user's whole body.

SUMMARY OF THE INVENTION

The present invention relates to a treadmill which comprises a frame having two rollers installed at two ends of the frame and an endless belt is mounted on the two rollers. One of the rollers is driven by a motor with a transmission belt connected therebetween. A control device is electrically connected to the motor and controls the motor to rotate in different directions alternatively.

The primary object of the present invention is to provide a treadmill wherein the endless belt shakes by the alternative rotation of the motor so that the users on the endless belt have extra exercise to their bodies. The angles that the motor rotates can be controlled by the control device so as to meet different requirements.

The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view to show the treadmill of the present invention;

FIG. 2 illustrates the angles that the motor operates in different directions;

FIG. 3 shows that the user on the endless belt feels the shaking;

FIG. 4 shows a pair of idle wheels are cooperated with the transmission belt, and

FIG. 5 is an exploded view to show a conventional treadmill.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 1 to 3, the treadmill 10 of the present invention comprises a frame having two rollers 11 installed at two ends of the frame and an endless belt 12 is mounted on the two rollers 11. One of the rollers 11 is driven by a motor 20 with a transmission belt 21 connected therebetween. A control device 30 is electrically connected to the motor 20 and controls the motor 20 to rotate in different directions alternatively. The control device 30 can be electrically connected with a control panel (not shown) on a handle bar (not shown) of the treadmill 10. As shown in FIG. 2, the motor 20 can be controlled by the control device 30 to rotate an angle θ such as 45 degrees in positive direction and then to rotate another angle θ′ such as 45 degrees in negative direction. In other words, the motor 20 rotates 90 degrees alternatively. By this pattern, the endless 12 shakes and the shaking is transferred to the user's body so that the user feels like being massaged during using the treadmill.

As shown in FIG. 4, a pair of idle wheels 40 are located between the motor 20 and the roller 11 driven by the transmission belt 21. The transmission belt 21 is located between the two idle wheels 40 which are in contact with the transmission belt 21 to ensure that the transmission belt 21 has desired tension so as to transfer the rotational force of the change of direction from the motor 20 to the roller 51.

While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention. 

1. A treadmill comprising: a frame having two rollers located at two ends of the frame and an endless belt mounted on the two rollers, one of the rollers being driven by a motor and a transmission belt connected between the roller and the motor, and a control device electrically connected to the motor and controlling the motor to rotate in different directions.
 2. The treadmill as claimed in claim 1, wherein a pair of idle wheels are located between the motor and the roller driven by the transmission belt, the idle wheels are in contact with the transmission belt.
 3. The treadmill as claimed in claim 1, wherein the motor rotates in opposite directions alternatively. 